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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.11649 |
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| _version_ | 1866909955594911744 |
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| author | Smíd, Michal Khademi, Pooyan Bähtz, Carsten Brambrink, Erik Chalupsky, Jindrich Cowan, Tom E. Cafiso, Samuele Di Dio Göde, Sebastian Grenzer, Jörg Hajkova, Vera Hilz, Peter Hippler, Willi Höpner, Hauke Horynova, Alzbeta Humphries, Oliver Jelinek, Simon Juha, Libor Karbstein, Felix Laso-Garcia, Alejandro Lötzsch, Robert Mathéron, Aimé Paulus, Gerhard G. Randolph, Lisa Sävert, Alexander Schlenvoigt, Hans-Peter Schwinekendorf, Jan Patrick Stöhlker, Thomas Toncian, Toma Valialshchikov, Maxim Weckert, Edgar Wessel, Colin Zepf, Matt |
| author_facet | Smíd, Michal Khademi, Pooyan Bähtz, Carsten Brambrink, Erik Chalupsky, Jindrich Cowan, Tom E. Cafiso, Samuele Di Dio Göde, Sebastian Grenzer, Jörg Hajkova, Vera Hilz, Peter Hippler, Willi Höpner, Hauke Horynova, Alzbeta Humphries, Oliver Jelinek, Simon Juha, Libor Karbstein, Felix Laso-Garcia, Alejandro Lötzsch, Robert Mathéron, Aimé Paulus, Gerhard G. Randolph, Lisa Sävert, Alexander Schlenvoigt, Hans-Peter Schwinekendorf, Jan Patrick Stöhlker, Thomas Toncian, Toma Valialshchikov, Maxim Weckert, Edgar Wessel, Colin Zepf, Matt |
| contents | Vacuum fluctuations give rise to effective nonlinear interactions between electromagnetic fields. These generically modify the characteristics of light traversing a strong-field region. X-ray free-electron lasers constitute a particularly promising probe, due to their brilliance, the possibility of precise control and favourable frequency scaling. However, the nonlinear vacuum response is very small even when probing a tightly focused high-intensity laser field with XFEL radiation and direct measurement of light-by-light scattering of real photons and the associated fundamental physics constants of the quantum vacuum has not been possible to date. Achieving a sufficiently good signal-to-background separation is key to a successful quantum vacuum experiment. To master this challenge, a darkfield detection concept has recently been proposed. Here we present the results of a proof-of-principle experiment validating this approach at the High Energy Density scientific instrument of the European X-Ray Free Electron Laser. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_11649 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Darkfield Approach to Measuring Vacuum Birefringence and Light-by-Light Couplings -- A Proof-of-Principle Experiment Smíd, Michal Khademi, Pooyan Bähtz, Carsten Brambrink, Erik Chalupsky, Jindrich Cowan, Tom E. Cafiso, Samuele Di Dio Göde, Sebastian Grenzer, Jörg Hajkova, Vera Hilz, Peter Hippler, Willi Höpner, Hauke Horynova, Alzbeta Humphries, Oliver Jelinek, Simon Juha, Libor Karbstein, Felix Laso-Garcia, Alejandro Lötzsch, Robert Mathéron, Aimé Paulus, Gerhard G. Randolph, Lisa Sävert, Alexander Schlenvoigt, Hans-Peter Schwinekendorf, Jan Patrick Stöhlker, Thomas Toncian, Toma Valialshchikov, Maxim Weckert, Edgar Wessel, Colin Zepf, Matt High Energy Physics - Experiment Optics Quantum Physics Vacuum fluctuations give rise to effective nonlinear interactions between electromagnetic fields. These generically modify the characteristics of light traversing a strong-field region. X-ray free-electron lasers constitute a particularly promising probe, due to their brilliance, the possibility of precise control and favourable frequency scaling. However, the nonlinear vacuum response is very small even when probing a tightly focused high-intensity laser field with XFEL radiation and direct measurement of light-by-light scattering of real photons and the associated fundamental physics constants of the quantum vacuum has not been possible to date. Achieving a sufficiently good signal-to-background separation is key to a successful quantum vacuum experiment. To master this challenge, a darkfield detection concept has recently been proposed. Here we present the results of a proof-of-principle experiment validating this approach at the High Energy Density scientific instrument of the European X-Ray Free Electron Laser. |
| title | The Darkfield Approach to Measuring Vacuum Birefringence and Light-by-Light Couplings -- A Proof-of-Principle Experiment |
| topic | High Energy Physics - Experiment Optics Quantum Physics |
| url | https://arxiv.org/abs/2506.11649 |